If the salesperson says;”This is the last one....” He is using :appeal to a higher authority.
国际商务英语（口语与听力）

章节列表

语音模仿作业1Chapter 1,2(副本)5Make a choice4Please make a choice5Chapter 7 delegating3Selling skills5chapter 11 persuaion(副本)3presentaion1Chapter 12 Answering questions4Being tough3chapter 21315 an indepth talk3